Omron D4N Series User manual

clever switches with more contacts and features
D4N SERIES
Next-generation safety switches
Advanced Industrial Automation

Omron’s industrial safety switches are well known for their quality and reliability around
the world. Now Omron introduces the D4N series, a new range of switches that combines
practical, cost-effective solutions with innovative features for the safeguarding and interlocking
of machinery doors. There are six sub-families in the range, each providing its own capabilities
for door-safety applications. These universal switches provide customers with a choice
of over 1500 configurations, so there’s literally a model for every requirement!
Total safety switching
solutions from Omron
Many of the new features in these switches are unique.
Make-before-break contacts, for example, provide enough
time for vital process information to be saved before the
system is shut down. More contacts have been added
to the switches so that one is available to provide
feedback data to the control system. Gold-clad contacts
have been included for switching micro-loads and
higher current more reliably. And all switches are tested
to guarantee at least 1 million operations. No matter how
safety-critical the requirement, Omron’s D4N series has
an excellent product solution for your application!
D4N
Plunger
D4N M12
Roller lever
D4NS D4N
Roller arm lever
D4N
General limit switch
D4NR
Rubber roller

D4N
This basic safety limit switch can have different actuators
(for example roller lever and roller plunger) to suit the
application. Designed for door monitoring, it is the ideal
additional safety measure in case the main safety switch fails.
In addition to machine directive related standards the D4N
conforms to EN115 (for escalators) and EN81 (for lifts).
D4NR
This manual reset switch works like an ordinary limit switch,
but once it’s activated, the system that it protects remains
in the OFF position until the switch is manually reset. Of course
D4NR also conforms to EN115 and EN81.
D4NS
The D4NS is a safety door switch that is suitable for safety
guard interlocking according to EN1088 (ISO 14119).
The D4NS offers superior features at a very attractive price,
in a size that is in accordance with EN 50047.
D4NH
A safety-door hinge switch whose miniature size makes
it ideal for use in machines and other equipment where space
is a premium. The hinge switch can be hidden in a door,
preventing it from being defeated. It is ideal for use in safety-
critical applications to provide mechanical redundancy
in systems up to Category 4.
D4NL
A completely redesigned version of its predecessor, this
guard-lock safety-door switch offers a holding force of 1300N
to provide exceptional safety on doors. Its robust housing
meets IP67 specifications, enabling it to operate in the
harshest environment.
D4GL
This guard-lock safety-door switch is designed for interlocking
applications where a slim profile is required. It offers
an impressive holding force of 1000N to provide exceptional
safety on doors.
The six sub-families in this safety switch range include:
D4NH
Shaft switch
D4N
Roller plunger

More contacts for increased functionality
To comply with safety requirements, safety systems need
built-in redundancy. That’s why all of our safety switches
have extra contacts. Our D4N, D4NH, D4NS and D4NR models,
for example, have versions with 3 contacts; two normally
closed contacts for redundancy, and NO contacts to provide
a feedback contact to a PLC or HMI for monitoring the system
status. Identifying a problem quickly in the system reduces
downtime considerably and saves you money. In applications
like moulding and machine tooling, where interlock switches
are required, our 5-contact D4NL and D4GL switches are ideal.
When access to a critical process is required, the internal
solenoid-locking device gives the machine time to switch off
without damaging the process before enabling the door
to be safely opened.
Clever solutions that work for you - make-before-break
(MBB) contact
Once a door with a safety switch is opened the Normally
Closed (NC) contact in the safety switch opens and the
Normally Open (NO) contact closes. If there is an NO contact
connected to a PLC, any data inside is lost as soon as the
power switches off. That’s why Omron has incorporated
innovative make-before-break (MBB) contacts in the D4N,
D4NS, D4NH and D4NR switches. With an MBB contact the
normally open contact closes before the normally closed
contact opens. This provides enough time for the control
system (PLC) to save the process condition or similar vital
data. Now that’s clever!
Gold-clad contact for high reliability
A special gold-clad contact makes each switch suitable for
switching both standard loads and micro-loads. The switches
are tested to operate reliably at least one million times.
Plug and play connection with the M12
All two-contact single conduit switches (D4N,
D4NS, D4NH and D4NR) can be ordered with
a pre-assembled M12 connector. Installing this
four-pin connector is simply a matter of plug and
play, which reduces the need for especially skilled personnel
during periodic maintenance.
Standard key for safety-door interlocking
The key used in all key-operated switches
(D4NS, D4NL and D4GL) is four-times coded
to prevent any tampering. And one size fits
all models for easy replacement!
Environmentally friendly
In line with Omron’s environmental policy for all
electronic components, these safety switches
contain no lead, cadmium or hexavalent
chrome. What’s more, they already comply with
the EU directive on hazardous substances
(RoHS), which will be law in every European country by 2006.
Ready for the Chinese market
The People’s Republic of China has implemented a mandatory
certification on a wide range of products manufactured or sold
in China. Labelled the CCC mark, this certification combines
the former CCIB (safety) mark and the CCEE mark for electrical
components. All of these safety switches are CCC approved
for this market.
Maximum positioning flexibility
One switch fits all actuation directions.
The heads can be turned 4 times 90°
for maximum flexibility. The key
operated switches can be
actuated from the side and top
(giving 8 possible directions).
Operation pattern
Time gap the control system assumes
the switch is closed.
Safety dedicated
Feedback contact
for PLC
Standard contact
MBB contact
Feedback contact
for PLC
Safety dedicated
Overlapping time in that the control
system can recognize a shut down
by the safety device.
NO (feedback channel)
NC
NC
NO (feedback channel)

Complete safety solutions – anywhere in the world!
Omron has recognised that in a dynamic market, the
only way to be a valuable partner is to offer total system
solutions. That’s why we have introduced a complete
line-up of products with the D4N series to cover safety
switch requirements for at least 95% of the market.
And this range is just part of Omron’s complete Safety
concept to provide technologies and solutions that can
seamlessly be integrated and networked to save you
time as a machine builder, no matter where in the
world you are!
Omron offers a wide range of HMI
solutions to manage machine status and
enter process data. If the safety system
switches off the machine or a problem
occurs, the HMI displays instructions
on what the user should do to get the
machine back in service and ensure safe
operation. The smart platform supports
preventive maintenance too to support
high availability and reliability.
Intelligently combined
E-Stop buttons with
useful accessories
support the total safety
solution from OMRON.
The safety door switch ensures that
hazardous movements are stopped,
as long the door remains open.
Depending on the application,
an interlock switch keeps the door
closed and safe until the process
is in a condition to stop without
damaging goods.
DeviceNet safety remote modules support
efficient wiring and control safety-related
signals in parallel with standard
messaging. The status of the safety device
is available in the standard PLC for
diagnosis. The DST series features
preventive maintenance and provides
a highly reliable safety solution.
Safety modules provide dedicated safety functions. In addition to the
conventional safety relay units, there are ‘intelligent safety units’ that
define a new area of applications. The G9SX intelligent safety units have
a unique and clever dynamic logical combination facility. They gain
transparency and reliability by reducing wiring and space.
The ‘Safe Network controller’ is the heart of the safety
system. Via an appropriate number of local I/Os and
using DeviceNet safety communication, the Safe Network
controller can control allsafety-related functions.
It handles diagnostics and traces the proper function
of maintenance relevant parameters. This very compact
device saves space in the cabinet and provides superior
features for a highly productive safety solution.
Inverters and servos from Omron provide
reliable and powerful muscles for your application.
In combination with Omron safety systems, the
machine can be stopped safely even if it is an
Emergency stop condition or just a door being
opened for maintenance.
OMRON PLC systems provide you with the highest
performance in the smallest size. Supporting smart
platform functionality, the PLC gives you excellent
control of your machine. Via DeviceNet the whole
status of the safety system is transparent.
Clever connection concepts
like Plug-and-Play
controllers for safety
sensors and intelligent
DeviceNet safety remote
I/O modules support easy
installation and maintenance.
These concepts support the
integrity of the entire safety
concept.
The S8 range of power supplies ensures
a constant and reliable power source for
your control system. Depending on the
series, they can support diagnosis and
preventive maintenance.
Safety light curtains
support complex
functions like blanking
and muting. Using these
features, goods can be
processed without
hindrance in a well-
designed safety concept.
Photoelectric switches,
from miniature sizes up
to highly precise laser
displacement sensors,
ensure accurate and
reliable signals to control
your process and quality.
Smart safety solution

Keys for D4NS, D4NL and D4GL:
D4DS-K1: Horizontal mounting
D4DS-K2: Vertical mounting
D4DS-K3: Adjustable horizontal mounting
D4DS-K5: Adjustable horizontal and vertical mounting
D4NR
Manual reset safety
limit switch
(EN50047)
2,3 (MBB)
67
Up to
Category 4
PG 13,5
(1+2 conduit)
M20
(1+2 conduit)
M12
D4NS
Safety door
switch
(EN50047)
2,3 (MBB)
67
Up to
Category 4
PG 13,5
(1+2 conduit)
M20
(1+2 conduit)
M12
D4NL
Square interlock
switch
(1300N)
4,5
67
Up to
Category 4
2 x PG 13,5
2 x M20
D4GL
Slim interlock
switch
(1000N)
4,5
67
Up to
Category 4
3 x PG 13,5
3 x M20
D4NH
Safety door
hinge switch
(EN50047)
2,3 (MBB)
67
Up to
Category 4
PG 13,5
(1+2 conduit)
M20
(1+2 conduit)
M12
G1/2 and NPT conduit are available on request
Overview of the D4N series of safety switches
Type
Contacts
IP
Safety category
(EN954)
Conduit
Connector
D4N
Safety limit
switch
(EN50047)
2,3 (MBB)
67
Up to
Category 4
PG 13,5
(1+2 conduit)
M20
(1+2 conduit)
M12
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